# Copyright (c) 2016-2019 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test using named arguments for RPCs."""

from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal, assert_raises_rpc_error


class NamedArgumentTest(BitcoinTestFramework):
    def set_test_params(self):
        self.num_nodes = 1
        self.supports_cli = False

    def run_test(self):
        node = self.nodes[0]
        h = node.help(command="getblockchaininfo")
        assert h.startswith("getblockchaininfo\n")

        assert_raises_rpc_error(
            -8, "Unknown named parameter", node.help, random="getblockchaininfo"
        )

        h = node.getblockhash(height=0)
        node.getblock(blockhash=h)

        assert_equal(node.echo(), [])
        assert_equal(node.echo(arg0=0, arg9=9), [0] + [None] * 8 + [9])
        assert_equal(node.echo(arg1=1), [None, 1])
        assert_equal(node.echo(arg9=None), [None] * 10)
        assert_equal(
            node.echo(arg0=0, arg3=3, arg9=9), [0] + [None] * 2 + [3] + [None] * 5 + [9]
        )
        assert_equal(node.echo(0, 1, arg3=3, arg5=5), [0, 1, None, 3, None, 5])
        assert_raises_rpc_error(
            -8,
            "Parameter arg1 specified twice both as positional and named argument",
            node.echo,
            0,
            1,
            arg1=1,
        )
        assert_raises_rpc_error(
            -8,
            "Parameter arg1 specified twice both as positional and named argument",
            node.echo,
            0,
            None,
            2,
            arg1=1,
        )


if __name__ == "__main__":
    NamedArgumentTest().main()
